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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Give a Reason Why a Green Deposit is Seen on the Surface of an Article of Copper

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प्रश्न

Give a reason why a green deposit is seen on the surface of an article of copper

एक पंक्ति में उत्तर
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उत्तर

The green deposit of the surface of the articles made of copper is seen due to the formation of green copper carbonate.

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अध्याय 6: Metals and Non-metals - Exercise

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संबंधित प्रश्न

A metal with melting point less than 50°C is


Aluminium is not used to make : 


Fill in the blank spaces by choosing the correct words from the given list. 

List: amalgam, chlorine, gallium, sodium chloride, silver chloride 

______ is a liquid metal. 

 


Statements given below are incorrect. Write the correct statements : 

Bronze is a mixture of 10% copper, 80% zinc and 10% tin.  


Write ‘True’ or ‘False’ in front of following statement. 

Magnesium is used in making light weight alloys of aluminium. 


State two important uses of following metal 

Uses of tin  


State two important uses of the following metal. 

Uses of magnesium  


Take an element from an alkali metal and one from an alkaline earth metal and write an equation  for their action with:

Hydrochloric acid,


Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:

Water.


What is it made from? Why?

A pair of tongs.


With reference to the following metals state their use in daily life metal:

iron


Aluminium: _______: gold : : electric insulator


Write the name.

Two highly reactive metals-


Compare the properties of metals and nonmetals. Give three examples for each.


Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?


Which one of the following four metals would be displaced from the solution of its salts by other three metals?


Metals are ______ conductors of heat and electricity.


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.


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